<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
	div{
		margin:0 auto;
	}
	.div01{
		width:700px;
		height:700px;
		border:solid #000;
	}
	.div02{
		background-color:#F00;
		width:700px;
		height:200px;
		float:left;	
	}
	.div03{
		background-color:#0FF;
		width:200px;
		height:500px;
		float:left;
	}
	.div04{
		background-color:#0F0;
		width:500px;
		height:500px;
		float:left;
	}
</style>
</head>

<body>
	<div class="div01">
    	<div class="div02"></div>
        <div class="div03"></div>
        <div class="div04"></div>
    </div>
</body>
</html>
